[INFO] crate hematite-nbt 0.3.0 is already in cache
[INFO] extracting crate hematite-nbt 0.3.0 into work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/reg/hematite-nbt/0.3.0
[INFO] extracting crate hematite-nbt 0.3.0 into work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/reg/hematite-nbt/0.3.0
[INFO] validating manifest of hematite-nbt-0.3.0 on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of hematite-nbt-0.3.0 on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing hematite-nbt-0.3.0
[INFO] finished frobbing hematite-nbt-0.3.0
[INFO] frobbed toml for hematite-nbt-0.3.0 written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/reg/hematite-nbt/0.3.0/Cargo.toml
[INFO] started frobbing hematite-nbt-0.3.0
[INFO] finished frobbing hematite-nbt-0.3.0
[INFO] frobbed toml for hematite-nbt-0.3.0 written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/reg/hematite-nbt/0.3.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking hematite-nbt-0.3.0 against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-7/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/reg/hematite-nbt/0.3.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 1f48d3c60ee348c64fd258a3c8351b46c2ac2b72b81d0f75fa3eb03db363d3d1
[INFO] running `"docker" "start" "-a" "1f48d3c60ee348c64fd258a3c8351b46c2ac2b72b81d0f75fa3eb03db363d3d1"`
[INFO] [stderr]     Checking hematite-nbt v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/error.rs:68:40
[INFO] [stderr]    |
[INFO] [stderr] 68 |             Error::IoError(ref e) => e.cause(),
[INFO] [stderr]    |                                        ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/error.rs:68:40
[INFO] [stderr]    |
[INFO] [stderr] 68 |             Error::IoError(ref e) => e.cause(),
[INFO] [stderr]    |                                        ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/blob.rs:50:24
[INFO] [stderr]    |
[INFO] [stderr] 50 |     pub fn from_reader(mut src: &mut io::Read) -> Result<Blob> {
[INFO] [stderr]    |                        ----^^^
[INFO] [stderr]    |                        |
[INFO] [stderr]    |                        help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/blob.rs:50:24
[INFO] [stderr]    |
[INFO] [stderr] 50 |     pub fn from_reader(mut src: &mut io::Read) -> Result<Blob> {
[INFO] [stderr]    |                        ----^^^
[INFO] [stderr]    |                        |
[INFO] [stderr]    |                        help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/value.rs:88:32
[INFO] [stderr]    |
[INFO] [stderr] 88 |     pub fn write_header(&self, mut dst: &mut io::Write, title: &str) -> Result<()> {
[INFO] [stderr]    |                                ----^^^
[INFO] [stderr]    |                                |
[INFO] [stderr]    |                                help: remove this `mut`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/value.rs:88:32
[INFO] [stderr]    |
[INFO] [stderr] 88 |     pub fn write_header(&self, mut dst: &mut io::Write, title: &str) -> Result<()> {
[INFO] [stderr]    |                                ----^^^
[INFO] [stderr]    |                                |
[INFO] [stderr]    |                                help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/value.rs:96:25
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn write(&self, mut dst: &mut io::Write) -> Result<()> {
[INFO] [stderr]    |                         ----^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/value.rs:155:24
[INFO] [stderr]     |
[INFO] [stderr] 155 |     pub fn read_header(mut src: &mut io::Read) -> Result<(u8, String)> {
[INFO] [stderr]     |                        ----^^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/value.rs:96:25
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn write(&self, mut dst: &mut io::Write) -> Result<()> {
[INFO] [stderr]    |                         ----^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/value.rs:155:24
[INFO] [stderr]     |
[INFO] [stderr] 155 |     pub fn read_header(mut src: &mut io::Read) -> Result<(u8, String)> {
[INFO] [stderr]     |                        ----^^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/value.rs:170:32
[INFO] [stderr]     |
[INFO] [stderr] 170 |     pub fn from_reader(id: u8, mut src: &mut io::Read) -> Result<Value> {
[INFO] [stderr]     |                                ----^^^
[INFO] [stderr]     |                                |
[INFO] [stderr]     |                                help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/value.rs:170:32
[INFO] [stderr]     |
[INFO] [stderr] 170 |     pub fn from_reader(id: u8, mut src: &mut io::Read) -> Result<Value> {
[INFO] [stderr]     |                                ----^^^
[INFO] [stderr]     |                                |
[INFO] [stderr]     |                                help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/value.rs:309:14
[INFO] [stderr]     |
[INFO] [stderr] 309 | fn read_utf8(mut src: &mut io::Read, len: usize) -> Result<String> {
[INFO] [stderr]     |              ----^^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/value.rs:309:14
[INFO] [stderr]     |
[INFO] [stderr] 309 | fn read_utf8(mut src: &mut io::Read, len: usize) -> Result<String> {
[INFO] [stderr]     |              ----^^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.62s
[INFO] running `"docker" "inspect" "1f48d3c60ee348c64fd258a3c8351b46c2ac2b72b81d0f75fa3eb03db363d3d1"`
[INFO] running `"docker" "rm" "-f" "1f48d3c60ee348c64fd258a3c8351b46c2ac2b72b81d0f75fa3eb03db363d3d1"`
[INFO] [stdout] 1f48d3c60ee348c64fd258a3c8351b46c2ac2b72b81d0f75fa3eb03db363d3d1